the intentional or unintentional sounds they make.

In general, any animal that reacts to sounds or communicates by means of sound, needs to have an auditory mechanism. This typically consists of a membrane capable of vibration known as the tympanum, an air-filled chamber and sensory organs to detect the auditory stimuli.

Insects

Tetrapoda

Anura

In frogs and toads, the tympanum is a large external oval shape

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